Severity of Leaf Rust and Brown Eyespot in Genotypes of &amp;lt;i&amp;gt;Coffea arabica&amp;lt;/i&amp;gt; L. Cultivated with High Plant Density

Rodrigues, Wagner Nunes; Tomaz, Marcelo Antônio; Apostólico, Márcio Antônio; Colodetti, Tafarel Victor; Martins, Lima Deleon; Christo, Leonardo Fardim; Brinate, Sebastião Vinícius Batista; Jesús, Waldir Cintra de; Amaral, José Francisco Teixeira do

doi:10.4236/ajps.2014.525386

Cited by 13 publications

(12 citation statements)

References 7 publications

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“…In the region where this experiment was developed, the main coffee diseases are the leaf rust and the brown-eye spot, both caused by a fungus (Hemileia vastatrix and Cercospora coffeicola, respectively). Rodrigues et al (2014b) have shown that, by following the occurrence of leaf spots in plagiotropic branches of C. arabica, it is possible to identify different levels of genotype resistance to certain diseases occurring in high density cultivation systems. Genotypes with high genetic resistance to the leaf rust fungus have been observed in these systems.…”

Section: Discussionmentioning

confidence: 99%

Biometry and diversity of Arabica coffee genotypes cultivated in a high density plant system

et al. 2016

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ABSTRACT. The present study was developed to respond to the need for an increase in crop yield in the mountain region of Caparaó (southern Espírito Santo State, Brazil), an area of traditional coffee production. This study aimed to analyze the diversity and characterize the crop yield of genotypes of Coffea arabica L. with potential for cultivation in high plant density systems. In addition, it also aimed to quantify the expression of agronomic traits in this cultivation system and provide information on the genotypes with the highest cultivation potential in the studied region. The experiment followed a randomized block design with 16 genotypes, four repetitions, and six plants per experimental plot. Plant spacing was 2.00 x 0.60 m, with a total of 8333 plants per hectare, representing a high-density cultivation system. Coffee plants were cultivated until the start of their reproductive phenological cycles and were evaluated along four complete reproductive cycles. Genotypes with high crop yield and beverage quality, short canopy, and rust resistance were selected. C. arabica genotypes showed variability in almost all characteristics. It was possible to identify different responses among genotypes grown in a high plant density cultivation system. Although the chlorophyll a content was similar among genotypes, the genotypes Acauã, Araponga MG1, Sacramento MG1, Tupi, and Catuaí IAC 44 showed a higher chlorophyll b content than the other genotypes. Among these, Sacramento MG1 also showed high leafiness and growth of vegetative structures, whereas Araponga MG1, Pau-Brasil MG1, and Tupi showed high fruit production. In addition, Araponga MG1 had also a higher and more stable crop yield over the years.

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Section: Discussionmentioning

confidence: 99%

Biometry and diversity of Arabica coffee genotypes cultivated in a high density plant system

et al. 2016

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“…Most coffee in Brazil is produced in this region and each of the three farms from which samples were collected for this study grew the same coffee variety, the Coffea arabica L., (cultivar Red Catuai, IAC-44) a breed developed by the Campinas Agronomy Institute (IAC in Portuguese) for higher yield in Brazilian soil and climate conditions [ 31 , 32 ] and higher resistance to fungal diseases [ 33 , 34 ]. Even though each farm has belonged to the same respective family for at least 3 generations, each showed a distinct method of farming practice.…”

Section: Methodsmentioning

confidence: 99%

Prokaryotic Diversity in the Rhizosphere of Organic, Intensive, and Transitional Coffee Farms in Brazil

Caldwell

Silva

et al. 2015

PLoS ONE

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Despite a continuous rise in consumption of coffee over the past 60 years and recent studies showing positive benefits linked to human health, intensive coffee farming practices have been associated with environmental damage, risks to human health, and reductions in biodiversity. In contrast, organic farming has become an increasingly popular alternative, with both environmental and health benefits. This study aimed to characterize and determine the differences in the prokaryotic soil microbiology of three Brazilian coffee farms: one practicing intensive farming, one practicing organic farming, and one undergoing a transition from intensive to organic practices. Soil samples were collected from 20 coffee plant rhizospheres (soil directly influenced by the plant root exudates) and 10 control sites (soil 5 m away from the coffee plantation) at each of the three farms for a total of 90 samples. Profiling of 16S rRNA gene V4 regions revealed high levels of prokaryotic diversity in all three farms, with thousands of species level operational taxonomic units identified in each farm. Additionally, a statistically significant difference was found between each farm’s coffee rhizosphere microbiome, as well as between coffee rhizosphere soils and control soils. Two groups of prokaryotes associated with the nitrogen cycle, the archaeal genus Candidatus Nitrososphaera and the bacterial order Rhizobiales were found to be abundant and statistically different in composition between the three farms and in inverse relationship to each other. Many of the nitrogen-fixing genera known to enhance plant growth were found in low numbers (e.g. Rhizobium, Agrobacter, Acetobacter, Rhodospirillum, Azospirillum), but the families in which they belong had some of the highest relative abundance in the dataset, suggesting many new groups may exist in these samples that can be further studied as potential plant growth-promoting bacteria to improve coffee production while diminishing negative environmental impacts.

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“…The estimative of genetic parameters shows the existence of considerable variation between genotypes for both systems. Genotypic differences causing expressions of different agronomic traits in C. arabica have been widely reported, such as for biometry of reproductive branches (Rodrigues et al, 2014a), nutritional parameters (Martinez et al, 2011;Moura et al, 2015;Martins et al, 2015;Rodrigues et al, 2015), resistance of plant diseases (Sera et al, 2010;Del Grossi et al, 2013;Rodrigues et al, 2014b;Shigueoka et al, 2014), drought tolerance (DaMatta, 2004;Nardini et al, 2014), and crop yield (Carvalho et al, 2012;Rodrigues et al, 2014c).…”

Section: Genetic Variability Among Genotypes In the Rainfed Farming Smentioning

confidence: 99%

Genetic variability and expression of agro-morphological traits among genotypes of Coffea arabica being promoted by supplementary irrigation

et al. 2017

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The use of supplementary irrigation to sustain the plantation during moments of severe water stress or moments of high water demand is becoming almost a norm to keep sustainable crops, especially due to the climate changes and the high frequency in which climate extremes are occurring lately. The objective of this study was to evaluate the agronomic performance and expression of genetic variability among genotypes of Coffea arabica L. cultivated in farming systems with different levels of water supply, focusing on rainfed or supplementary irrigated systems. The experiment was developed in competition field, testing 8 genotypes of C. arabica L. in rainfed or supplementary irrigated systems. The growth and production were evaluated during 2 consecutive cycles (2014-2015 and 2015-2016). Among the growth gains, it was observed large gains in coffee yield, but the magnitude of the gains varied among genotypes. For crop yield, for example, Paraíso MG/H 419-1 presented 136% gain, while Oeiras MG-6851 was capable of yielding as much more coffee in rainfed conditions than in irrigated system. The expression of variability for some agronomic traits (such as coffee yield, canopy size, growth rate, and number of new buds) may be intensified by the supplementary water supply, which promotes gains in production and growth, increases the magnitude of variation among genotypes and allows to identify different patterns for selection, which may not be observed in the rainfed systems.

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Severity of Leaf Rust and Brown Eyespot in Genotypes of <i>Coffea arabica</i> L. Cultivated with High Plant Density

Cited by 13 publications

References 7 publications

Biometry and diversity of Arabica coffee genotypes cultivated in a high density plant system

Biometry and diversity of Arabica coffee genotypes cultivated in a high density plant system

Prokaryotic Diversity in the Rhizosphere of Organic, Intensive, and Transitional Coffee Farms in Brazil

Genetic variability and expression of agro-morphological traits among genotypes of Coffea arabica being promoted by supplementary irrigation

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